package org.bukkit.command.defaults;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;

import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Arrays;


public class PingCommand extends BukkitCommand {
    public PingCommand(String name) {
        super(name);

        this.description = "Gets ping of player";
        this.usageMessage = "/ping [playername]";
        this.setPermission(null);
        this.setAliases(Arrays.asList("pings"));
    }

    @Override
    public boolean execute(CommandSender sender, String currentAlias, String[] args) {
        if (!testPermission(sender)) return true;
        if (sender instanceof Player) {
            Player player = (Player) sender;
            if (args.length < 1 || args[0].length() == 0) {
                sender.sendMessage("§a§l>> §7Your ping is " + colorPing(getPing(player)));
            }
        } else if (Bukkit.getPlayerExact(args[0]) != null) {
            Player player = Bukkit.getPlayerExact(args[0]);
            sender.sendMessage("§a§l>> §7" + player.getName() + "" + "'s ping is " + colorPing(getPing(player)));

            } else {
                sender.sendMessage(args[0] + " not found.");
            }
        return true;
    }
    private static final String CRAFT_BUKKIT_PACKAGE;
    private static final String NET_MINECRAFT_SERVER_PACKAGE;

    private static final Class CRAFT_PLAYER_CLASS;
    private static final Method CRAFT_PLAYER_GET_HANDLE_METHOD;

    private static final Class ENTITY_PLAYER_CLASS;
    private static final Field ENTITY_PLAYER_PING_FIELD;


    static {
        try {
            String version = Bukkit.getServer().getClass().getPackage().getName().replace(".", ",").split(",")[3];

            CRAFT_BUKKIT_PACKAGE = "org.bukkit.craftbukkit." + version + ".";
            NET_MINECRAFT_SERVER_PACKAGE = "net.minecraft.server." + version + ".";

            CRAFT_PLAYER_CLASS = Class.forName(CRAFT_BUKKIT_PACKAGE + "entity.CraftPlayer");
            CRAFT_PLAYER_GET_HANDLE_METHOD = CRAFT_PLAYER_CLASS.getDeclaredMethod("getHandle");
            CRAFT_PLAYER_GET_HANDLE_METHOD.setAccessible(true);

            ENTITY_PLAYER_CLASS = Class.forName(NET_MINECRAFT_SERVER_PACKAGE + "EntityPlayer");
            ENTITY_PLAYER_PING_FIELD = ENTITY_PLAYER_CLASS.getDeclaredField("ping");
            ENTITY_PLAYER_PING_FIELD.setAccessible(true);


        } catch (Exception e) {
            e.printStackTrace();

            throw new RuntimeException("Failed to initialize Bukkit/NMS Reflection");
        }
    }

    public static int getPing(Player player) {
        try {
            int ping = ENTITY_PLAYER_PING_FIELD.getInt(CRAFT_PLAYER_GET_HANDLE_METHOD.invoke(player));

            return ping > 0 ? ping : 0;
        } catch (Exception e) {
            return 1;
        }
    }

    public static String colorPing(int ping) {
        if (ping <= 40) {
            return ChatColor.GREEN + "" + ping;
        } else if (ping <= 70) {
            return ChatColor.YELLOW + ""  + ping;
        } else if (ping <= 100) {
            return ChatColor.GOLD + ""  + ping;
        } else {
            return ChatColor.RED + ""  + ping;
        }
    }






}